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Question: Answered & Verified by Expert
Bacteria protect themselves from viruses by fragmenting viral DNA with
BiologyBiotechnology - Principles and ProcessesNEET
Options:
  • A ligase
  • B endonuclease
  • C exonuclease
  • D gyrase
Solution:
1280 Upvotes Verified Answer
The correct answer is: endonuclease
In 1963 two enzymes responsible for restricting the growth of Bacteriophage in E. coli were isolated. One of these added methyl groups to bacterial DNA, while other cut viral DNA. The enzyme which cuts the DNA was later named as restriction endonuclease.

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